Mechanism



H. BOCKISCH.

MECHAMSM FOR SYNCHRONIZING THE OPERATIONS OF MOVING PARIS.

APPLICATION FILED DEC. 15. 1912.

1,324,779. I Patented Dec.16,1919.

5 SHEETS-SHEET I.

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H, BOCKISCH.

MECHANISM FOR SYNCHRONIZING THE OPERATIONS 0F movme PARTS.

APPLICATION. FILED DEC.15. I917.

Patented Dec. 16,1919.

5 SHEETS SHEET 2 Sl flflYZIZF/ET Bot/mam,

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arm.

H, OCKiSCH.

MECHANISM FOR SYNCHRONIZING THE OPERATIONS 0F MOVING PARTS. APPLICATION FILEDDEC. 15. 1917.

1,324,779. Patented Dec.16,1919.

5 SHEETS SHEET 3.

Ea. 1a

H. BOCKISCH.

MECHANISM FOR SYNCHIIONIZING THE OPERATIONS OF MOVING PARTS.

APPLICATION -F|LED DEC. I5, 19H. 1 324 779 Patented Dec. 16,1919.

5 SHEETS--SHEET 4.

R QuuuaI'ot H. BOCKSSCH.

MECHANISM FOR SYNCHRONIZING THE OPERATIONS 0F MOVING PARTS.

APPLICATIQN FILED DEC. l5. X917- 1 ,324,77& Patented Dec. 16,1919.

5 SHEETS-SHEET 5.

3 3n men hm provements in Mechanism for Synchroniz- UNITED STATES PATENT OFFICE.

fiEmnIcH BOCKISCH, or rooenxnnrsm, NEW YORK, AssIe-non TO M. WELTE & sons,

' OFNEW YORK, N. Y., A CORPORATION or NEW YORK.

, MECHANISM FOR SYNQHBONIZING THE OPERATIONS 01 MOVING- PARTS.

Specification of Letters Patent.

T Patented Dec. is; 1919.

Application filed December 15, 1917. Serial No. 207,332.

To all whom itmay concern Be itknown that I, HEINRICH BOCKISCH, a subject of the Emperor of Austria-Hungary, residing at Poughkeepsie, in the county of Dutchess and State of New York, have invented certain new and .useful Iming the Operations of Moving Parts, of which thejollowing is a specification.

This invention relates to improvements in mechanisms for synchronizing the operations of moving parts, and particularly for the synchronization of a pneumatically-operated'record-controlled instrument with another instrument or means of appropriate ployed to synchronize the operations. of a phonograph and an automatic piano, organ, orchestrion, or thevlike, and hence I have shown preferred embodiments ofthe invention when employed for this particular purpose, b'ut it'will be linderstood that this is merely exemplary, as the invention considn 0 hereinafter described primary controlling elements, which are peculiarly approprn ered in its broadest aspects, may be applied to many different classes of machinery, apparatus or instruments by suitable modification of elements which are more or less immaterial to the real invention here involved, the said modification having reference principally to the substitution for the ate to a phonograph and a self-playing piano, organ or orchestrion, ,of other primary controlling elements more especially adapted for theparticular class or style of machines, apparatus or instrumentswhich are to be synchronized. 0

In the accompanying drawings, wherein like characters of referencedesign'ate' cor; responding parts in the'several views:

Figure 1 is a schematic sectional represeirtation of one embodiment of my invention applied to the synchronization of the operations of a phonograph and an instrument played by a perforated note sheet or record.

In this particular embodiment the period of acceleration or retardationof one instrument commences when one primary controlling element comes into operation andterminates when the operation of the other primary-controlling element commences.

Fig. 1 is a fragmentary representationof a part of the element 59' (or 60) and a part of the element 63 (or 64) preferably eniployed 1n the various forms of the invention,

and is particularly intended to show the part of the note sheet and with special apertures to successively open a. special duct in the tracker board.

Fig. 3 is a schematicisectional representation of certain parts and shows their several positions when the speed of the record of 'the piano or the like is being accelerated.

Fig. 4 is a like view of the same parts but shows the positions when the period of ac celeration has been terminated and before the parts have been returned to their original positions: in other Words, while both primary controlling elements are in operation. a

Fig. 5 is a view similar to' Fig. 3 of the same parts shown in said figure, but modified to effect an acceleration of the speedof the record throughout the entire period of the operation of the primary controlling element of the other instrument when the latter is traveling faster than the former,

or the retardation of the speed of the record piano with the construction shown in Figs.

1 to 4, inclusive.

Figs. 10 and 11 are similar views to illustrate the periods of acceleration and retardation when the form illustrated in Fig. 5 is employed; and

Figs. 12 and 13 are similar views to illustrate said periods when the form illustrated in Figs. 6 and 7 is employed.

In all the figures of the drawings: A and B designate two movable or traveling parts whose movements are to. be synchronized by the present mechanism. In this particular application of the invention the part A is the table of a phonograph of any approved or suitable kind and the part B is a perforated note sheet such as is commonly employed as'the record for controlling the operation of actuating pneumatics in player pianos, piano players, automatic organs, orchestrions .or other suitable musical instruments. It is well known that in practice the table A is rotated at a regulated speed by a suitable motor, and hence it is not nec essary to illustrate or further refer herein to the mechanism for driving said table. It is also understood that the note sheet or record B is caused in practice to travel at a regulated speed over a tracker board 6, and that it is perforated and in its travel over the tracker board opens and closes ducts b, (Fig. 2), formed in the latter, these ducts respectively communicating with certain pneumatics (not shown) of a player action whose nature .is such that it controls the operation of the sound emitting elements of the instrument by acting directly on appropriate elements of a piano action, as is usual in player pianos, or upon the keys of the piano, as usual in piano players, or by opening air passages to reeds or pipes or other sound producing elements. as is common in organs or orchestrions for example. It is apparent that any means adapted to open and close the several ducts o of the tracker board, when the latter is employed,

in a predetermined succession, may be utilized in lieu of the perforated note sheet B, and hence I would have it understood that the term record wherever herein used is intended to comprehend any such device or means.

The record B in operation is wound onto a take-up roll 0 which, as shown in Fig. 1, derives motion from a wind motor, illustrated conventionally at c. As it is common in instruments or this class to connect such motors with the take-up roll of the instrument 'for the purpose stated, and as a particular connection of the motor with such roll is in no wise a part of my present invention, I shall not undertake to illustrate or describe any particular connection in detail.

Moving with the table A and record B respectively are what I have elected to call primary controlling elements, which will be presently more particularly described. They control the operation of the synchronizing mechanism. The synchronizing mechanism comprises elements so correlated and combined as to bring about the correction of the speed of one instrument when it is traveling faster or slower than the other, and to do this promptly and with such certainty that 1 there is no noticeable lack of synchroniza tion in the operation of the two instruments or machines: .it being understood that the record B and the phonograph record have been properly prepared with reference to each other in the first instance and that the defects to be corrected are those due to friction and other conditions which influence the two instruments difi'erently and make it ad visable to force one instrument to follow every fluctuation in the speed of the other.

The present invention aims to secure a practically perfect synchronization" of the instruments by mechanism of very simple nature.

In practice it is preferred to so arrange the synchronizing mechanism that the speed of one machine or instrument will be directed or controlled by the other. When the mechanism is arranged to synchronize a phonograph and a player piano or the like, it is preferred to control the speed of the piano or the like from the phonograph, and each of the herein illustrated embodiments, of the invention exemplifies such an arrangement.

Each of said embodiments includes a system of pneumatically operated valves and motors. The present day practice being in favor of the utilization of suction in the operation of automatic pianos and the like,

(ie the difference in pressure between air at atmospheric, or normal, pressure and air at less than atmospheric, or subnormal, pressure) I prefer such arrangement and have 4 illustrated the same and will describe the invention exclusively with relation thereto, without, however, intending to restrict the invention to such arrangement, as by well 11 understood changes the mechanism may be easily adapted to utilize the difference in pressure between air at atmospheric pressure and air above atmospheric pressure.

In each of the several forms of the invention herein exemplified, the rimary controlling element associated with the table A, is an arcuate metallic strip 10 which is suitably secured to the underside of the table and is insulated therefrom: and the primary controlling element associated with the record B may be regarded as that part of the record adjacent to the longitudinal edge of the latter, the said part having, as shown, a series of spaced special apertures 11 arranged to open a special duct 1'2 connected to the tracker board B, intermittently.

Each of the illustrated embodiments of the invention includes two valved members markedD and E respectively. The member D preferably includes three chambers, re-

spectively marked 13, 14 and 15. Chamber 15 has a port 16 through which it has communication with the chamber 14 and said chamber 14 is separated from the chamber 13 by a membrane 17. The chamber 15 further has a port 18 and is provided with a valve-having a stem, 20, connected to the tion: its chambers are marked 22, 23 and 24; its ports are marked 25, 26 and 27 its membrane is marked 28; its valve is marked 29; and the stem of the valve is marked 30. The valves 19 and 29 form primary valves in the herein exemplified forms of the invention.

Each form cf the invention also contemplates the use of an air conduit 1 having connection with the wind motor C through a duct 31, and valved members G and H by which the tension of the air in the conduit T is changed under control or other parts of the synchronizing mechanism. The con duit F and the members G and H are shown only in Fig. 1. It will be noted that the conduit F is connected by a duct 32 with a chamber 33 of the member G andthat said member G has another chamber marked 34, which is connected by a duct 35 with a chamber 36 of the member H. The member H also has a chamber marked 37, which is separatedfrom the chamber 36 by a membrane 38 provided with a valve 39 which opens and closes a port 40 between the conduit F and the member H. The chamber 37 has a duct 41 to the atmosphere and the membrane 38 has a spring 38" which acts upon it in opposition to the pressure of air in the chamber 37. The openings through the duct 32 may be adjustably regu lated by any suitable means, as the screw 32, for example, and the duct 41 similarly may be adjustably regulated, as by the screw 41", for example. The chambers 33 and 34of the member G have communica tion with a common conduit 42 in said member, through ports 43 and 44 and these ports are opened and closed by secondary valves 45 and 46, respectively mounted in the chambers 33 and 34 and provided with stems 47 and 48. The conduit 42 is separated from other chambers, marked 49 and 50 respectively, by membranes 51 and 52 and these membranes are connected to the stems 47' and 48 of the valves 45 and 46.

' The conduit F is provided with a duct 53 by which it has connection with a suitable source of supply of regulated suction, while the conduit 42-01? the member G is suitably connected with a source of unregulated or stronger suction, through the duct 54. The chamber 14 of the member D and the corresponding chamber 23 of the member E similarly have communication with a suitable source of air under suction, the connection being exemplified by the ducts 55 and 56.

In each of the several herein exemplified forms of the invention there are two motors T and J. These motors are in the form of bellows whose movable boards 57 and 58 carry elements 59 and 60 which act to open valves 61 and 62 under certain conditions hereinafter explained. These elements 59 and 60 are fulcrumed at 59 60 to projections 57 and 58 which are secured to the movable boards 57 and 58 and substantially form parts thereof. K and L designate another pair or" motors, preferably in the form of ordinary bellows. Bellows K has a connection, shown at 63, slidably engaged with the valve opener 59 and when collapsed adjusts said valve opener intc position where its path of movement toward the valve 61 will be such that it will not engage the valve 61. The bellows L has a similar connection, shown at 64, to the valve opener 60, whereby the collapsing of the bellows will move said valve opener into position wherein it will not engage the valve 62 when the bellows J is collapsed. The valve openers 59 and 60 have springs 59 and 60 for holding them yieldably in engagement with the respective adjustingconnections 63 and 64.

i The valves 61 and 62 in all of the exem- I plified forms of the invention are hinged at 61 and 62 respectively and close the mouths of channels 65 and 66 formed in suitable members 67 and 68. The channel 65 is connected by a duct 69 with thechamber 49 of the member G and the channel 68 is connected by a duct 7 0 with the chamber 50 of said member (35'. These channels 65 and 66 when uncovered are open to the atmosphere. The valves 61 and 62 are pressed yieldably to their closed positions by springs 61 and 62".

The motors T and J, openers 59 and 60, motors K and L and devices 63 and 64 constitute a very desirable form or embodiment, whose employment therefor is preferred, of a means by which the valves 61 and 62 are selectively operated. This operation is controlled in accord with the movements of the parts to be synchronized, preferably by the means now to be described: In all of the herein exemplified forms of the invention. the motors 1 and L have communication, through suitable ducts hereinvalve chamber 15 oithe member D: and the motors J and K similarly have communication through appropriate duets, with the valve chamber 24 of the member E. Moreover, in each of the herein exemplified forms of the invention, the operation of the valve 19v in the member D is controlled primarily by the member which intermittently closes a circuit, hereinafter described, through an electro-magnet M whose armature m 1s provided with avalve 71 which opens and closes a duct 71 extending from a chamber 72 to the port 21 of the member I). The chamber 72 has an atmospheric port 73 and hence when the duct 71 is opened atmospheric air is admitted to the chamber 13. This duct 71- is opened when the magnet M is energized and is ClOSGd WhBII'SalCl magnet is deenergized, under control of the primary con troller 10 and the circuits'hereinafter to be explained.

I have thus described the several parts which are or may be common to the several particular embodiments illustrated in the drawings and hence bear the same reference characters throughout the drawings: and it will be apparent'in each of these embodiments that whenever the duct 12 is opened air will be admitted'to the chamber 22 of the member E, whereupon .the membrane 23 will be raised, thus moving the valve 29 to the position in which it opens the port 25 and closes the port 26. Suctional force accordingly is communicated to the ,bellows J and K, and the latter thereby collapsed,

through ductswhich will be later more par-.

ticularly referred to as they appear to differ somewhat from each other in the diagrammatic representations of the different embodiments. Obviously, when the bellows J is collapsed it moves the valve opener 60 toward the valve 62 and if the bellows L be expanded at this time, the valve 62 will be opened, thus admitting air to the channel 66,

which air will flow thence to the chamber 5O of the member G, whereupon the membrane 52 will rise, thus moving valve 46 and opening communication of the chamber 34 with the conduit 42. The unregulated suctional force in the conduit 42 accordingly will be communicated tov the membrane 38 in the member H, whereupon this membrane will be forced downward against the tension of 1 the spring 38 thus opening the port 40 beand thereby opening-the port 16 and closing the port 18. Air under suction will thus be communicated to the bellows I and the latter will, collapse and move the valve opener 59 toward the valve 61. It will be remembered,

however, that when the duct 12 was opened.

and the valve 29 raised, the bellows K was collapsed and hence it moved the valve opener 59 to position in which its movement toward the valve 61 does not brin it into -contact with the valve 61. Accor ingly it follows that the collapsing of the bellows I has no effect upon the valve 61 provided the valve 29 is open.

On the other hand, it will be apparent that; when the table A is'traveling ahead of the record B, the valve 19 .will be opened first. In such case, the bellows I and the bellows L will each be collapsed first. The collapsing of the bellows I will now cause the valve 61 to be opened and the collapsing of the bellows L will adjust the valve opener 60 to a. position in which its path of movement will be outside the valve 62. The opening of the valve 61 admits air at atmosphericpressure to the chamber 49 of member G, thus'causing the membrane 51 to rise and move the valve 45 to position in which the unregulated suction conduit 42 is in communication with the member F through ort 43, chamber 33 and duct 32'. This e ects a further attenuation of the air in the conduit F and, it follows that the motor G will now speeded up. y 4

When the valve 61 has been closed the entrance of air at atmospheric pressure into be l the chamber 49 ceases whereupon the valve 45 automatically returns to its 'position'flin which it closes the port 43 and hence acts to close communication of the conduit F with the conduit 42. The return of the valve 45 tothe position just described is expedited by the-provision of a bleed hole 74 and may be further expedited by a spring 74. The stem of "this valve is preferably connected to a pulpette 74" whereb stantially. air tight connection is maintained around the same.

Similarly when the valve 62 has been closed, the chamber 50 no longer has communication with the atmosphere and hence the valve 46 returns to the position in which it closes the port 44' and thereby cuts off communication of the chamber 36 into the suction conduit 42. ,This action of the valve 46 is expedited by the provision of a bleed hole 75. The spring 38 plus the force oil the chamber 36 by way of t e chamber 34 a sub-.

III

' whatever air atatmospherlc ressure enters valve 62 will follow the closing of the duct 12. It will also be understood that the duct v71 is closed when the magnet M is deenergized and that when it has been closedatmospheric pressure no longer enters chamber 13 whereupon the primary valve 19 will i duct, and when thus closed the primary valve 29 falls very promptly (there being a bleed hole 7'? connecting chambers 22 and 23) and closes port 25 and opens port 26, whereupon air at atmospheric pressure is admitted to the bellows J and K and the latter are againextended to their original forms. Further, it will be understood that each of the bellows employed in the mechanism will preferably be provided with I springs which are under tension when the bellows are collapsed and aid in expandingthem promptly, as is usual-in the pneumatics and motors of this type.

It will also be understood that the parts 61 and 62 which I have hereinbefore termed valves and which open and close the chan-' nels' 65 and 66 may desirably consist ofwooden strips having a suitable facing 61 and 62 for making an airtight connection with the members 67 and 68- adjacent to the mouths of, said channels.

Having now describedthe elements common to the-several herein exemplified forms of the invention, 1 will next describe the parts which differ in the several forms exemplified by the drawings premising this 'p'ortion of the description with the statement, which also applies in substance to the preceding description, that; the illustrations are largely of a diagrammatic nature and while for the sake of clearness of illustration they show particular relative positions of 1 From the negative terminal of the magnet a wire 79 extends to ,a place adjacent to the table A and terminates in a terminal 7 9. Another conductor, 80, extends to a place adjacent to the table A from the magnet M, and terminates in a terminal 80, which is adjacent to and spaced from the terminal .79. The gap between the terminals 79 and 80 is closed by the arcuate member 10 on the table A and hence the circuit through the magnet M is closed intermittently in the rotation of the table A and remains closed for a time determined by the length of the arcuate member 10 and the speed of rotation of the table.

The chamber 15 of the member D in these [figures is provided with a duct 81 to which isconnected, at'82, a duct 83 extendin to the bellows 1 and another duct 84, exten ing to the bellows L. Similarly, the chamber 2% of the member E is provided with a duct 85 to which is connected, at 86, a duct 87 which leads to the bellows J and another duct, 88, which leads to the bellows K.

it will be remembered that when the primary controlling element associated with the table A acts to open the duct 71 to the member Dand the'primary valve 19 in said member is thereby moved to open port 16, before the primary controlling element associated with the record B acts toopen the duct 12 to the member'E, the ellow's I is collapsed and the valve opener 59 is brought into engagement :with and opens the valve 161, thus bringing. about a further attenuation of the air in the conduit F and speeding up the motor C and also that the bellows IL is simultaneously collapsed and valve opener 60 thereby adjusted (see .Fig.

3)so that in its movement toward the valve 62 which occurs when the duct 12 is opened and the bellows J thereby collapsed, it will travel past said valve 62 without touching the same: and similarly that when the duct .12 is opened before the duct 71, the bellows ment with and opens the valve' 62 thus bringing about a lessene'datte'nuation of the 'airin the conduit F and slowing down the motor. C, and simultaneously therewith the valve opener 59is adjusted so that it will not make contact with the valve 61 when the occurs when the record B and table are trav elin in synchronism with each other, all of the ellows are collapsed simultaneously and hence neither valve 61, 62 is opened and no change in the degree of attenuation of the air in the conduit F takes place. shown in Fig t a d is Substantially true This is' with respect to all of the several herein exemplified forms of the invention, and what has been said with relation to the selective opening of the valves 61 and 62 also applies to all of the forms exemplified.

It has not however been definitely stated thus far that if the duct 71 is opened first and the opener 59 has been'moved and has opened the valve 61, the tendency upon the opening of the duct 12 is to withdraw said opener from its engagement with the valve: and similarly if the duct 12 is opened before the duct 71 has been opened and the opener 60 has been moved and has opened the valve 62, the tendency upon the opening of the duct 71 is to withdraw said opener from its engagement with the valve. If this tendency be unresisted and if the valve be allowed to close, it will follow that the action of speeding up the motor G when he duct 71* is opened first, will terminate the instant the duct 12 is opened; and, on: the other hand, the action of slowing down C when the dnct is opened first w 5 minate the instan the duct '4" 1 is seen.

But the tendency be resister Valve he held against closing wh opener has been withdrawn from eng ment therewith, the speeding up or slowin down or the motor will not be terminated instantly upon the opening or" the second opened duct but, by appropriate means, may he made to terminate at a predetermined later period. With th s in mind, I have exempliiied different arrangements. In one these arrangements (Figs. 1, 3 and l) the action, brought about by the opening of the first opened duct and the consequent opening of the corresponding valve 19 or 29, is terminated the instant the second-opened duct is opened, as it will be noted that either valve opener 59 or 60 is free to be moved oh the end of the corresponding valve 61, 62 and the valve when thus released is free to be returned tol its seat by'its spring (61 62). The period of speeding up or slow: ing down of the motor is then determined by the time elapsing between the opening ofthe two ducts (see Figs. 8 and 9). The sec- 0nd arrangement (Fig. 5) exemplifies a means b which the period of speeding up or slowing down of the motor extends throughout the entire period that the first opened duct is'opened (see Figs. 10 and 1 1). This may be accomplished by the addition of a suitable stop to each valve, as shown. These stops are designated 61 and 62. It will be noted that each is so related to the path of movement of the corresponding openers 59, 60, that the lattercannot be disengaged from its valve as long as its bellows (I, J) is collapsed. Hence the collapsing of the bellows I, J, is necessary to permit the valves 61, 62 to close.

66 p In the construction exemplified by F igs;

6 and 7, the acceleration or retardation extends throughout the period of time commencing with the opening of the first opened duct and ending with the closing of the second opened duct. This is accomplished by the provision of means operable to hold the first opened valve 61,-or 62 in its open position until the valve 19 or 29 second opened has been closed. The means herein exemplified are as follows:

An electro magnet M additional to the magnet M. is employed. This magnet M is operatively related to the member E, and its armature 0 carries a valve 90, which opens and closes a port 91, in a chamber 92 having an atmospheric port 93. The port 91 is connected by a duct 9% with the duct 12. There are also added four sets or pairs of spring contactors, marked 95, 96, Hand respectively, and hlocl'ng strips or sto I 99 and 1.00, r spectively and suitable circiiii; connectionsbetween the same, the magnets an a sinaplesonrce of electric potential,

' 1 these figu t v i o A terminal 102 adjacent but sgacec. from the first, extends to the po terminal of the M, a d a third wire, 103 extends from the negati .e terminal of the magnet M to the negative terminal of the source N. The second circuit, shown in lighter lines, is formed as follows: from the positive 1" nal of the source N a wire 10%: extends to bus bar fronwhich a wire 10G leads to one member 0.. he contact 96 and a second 1.1; wire 10? leads to one member of the contact 98. The other member of the contact96 is connected by a wire 108 to memb r i the contact 97, The other memoer of the contact is connected by a wire 109 to a terlit minal of the magnet M and the other terminaicf said magnet is connected by a wire 111 with the negative terminal of the source of electrical potential. A wire connects the remaining member of the contact 95 115 with the remaining membcrof the contact 98 and the remaining member of the contactor 97 is connected by a wire 112 with the positive pole of the magnet M, through a part of the wire 102 to which the wire 112 the source of electrical potential N wire 101, terminal 101*, controller 10, terminal 102", and wire 102 to magnet M, and by wire 103 back to the negative pole of the source. The magnet M being now energized attracts its armature and opens the valve 72. This as has been already explained, acts through the member D and the ducts connecting said member to the bellows I (which duct is marked 81 in Figs. 6 and 7) to cause the bellows I to collapse and open the valve 61. whereupon 'air at atmospheric pressure acts upon the membrane 51 in the member G (Fig. 1) and opens the valve 45, thereby subjecting the wind motor C to the strong, unregulated suction in the conduit 12, and speeding up the record B. The valve 61 has a projection 120 which engages one member of the contactor 97 and presses the same into engagement with the-other member thereof when said valve is opened.

At the same time bellows L is collapsed by suction from conduit 14 through port 16,

chamber 15, and duct 84!. This collapsing of'the bellows L pulls the valve opener 60 into position wherein in its downward movement, which occurs when bellows J 18 collapsed, as hereinafter described, it willpass by the valve 62 and press one member of contact 96 into engagement with the other. It will be understood that bellows J is collapsed when the duct 12 has been source. This circuit is shown in Fig. 7, the

heavy lines representing the shunt circuit which is now energized.

It will be noted that when communication of the bellows J with the suction conduit 23 was established by the opening of the duct 12 and the raising of the valve 29 the bellows K was alsoplaced under suction from said conduit 2?; through port 25, chamber 24 and duct 88%., The bellows K while thus subjected to suction is only slightly collapsed because the stop 100 is in such relation to the valve opener 59 as to prevent its moving out of engagement with valve 61.

This period of acceleration thus continues until duct 12 is closed, whereupon all parts return to their positions ready for anr other operation.

If the music roll or record is traveling too fast, in which case the duct 12 is opened be- 102 is bridged by the member 10, the pri mary valve 29 is raised to open port 25 and close port 26, thus placing bellows J and K in communication with the suction conduit 23. The collapsing of the bellows J opens valve 62 and engages one member of contact 95 with the other member thereof by means of the projection 121. The collapsing of the bellows K pulls the valveopener 59 out of operative relation with the valve 61 and places it in position in which its movement downward will press one member of contact 98 in engagement with the other member thereof.

The opening of the valve 62 also established communication of chamber 50 in member G with theatmosphere, thus raising valve 16 and opening communication of chamber 36 of member H with the strong, unregulated, suction in conduit 42. The valve 38 is thus withdrawn from port 40, whereupon communication of conduit F with the atmosphere is established and the attenuation of the air in said conduit is thereby reduced and the motor C slowed down, all as hereinbefore explained.

When now the gap between the terminals 101 and 102 is bridged by the member 10 the magnet M is energized and the valve 72 is raised, and the bellows I is collapsed, all as before. At this time, however, the valve opener 59 having been previously moved into position wherein it will not engage the valve 61 and will engage the contact 98, will, when the bellows I, is collapsed bring about an engagement of the members of the contact 98 and another shunt circuit will be established as follows :-from the negative pole of the source by wire 111, through magnet M, wire 109, contact 95, wire 110, contact 98, wire 107, bus bar 105 and wire 104:, to the positive pole of the source.

Thus in the form exemplified by Figs. 6 and 7 the operation of one primary valve 19 or 29 in advance of the other not only acts through the mechanism described to accelerate or retard the movement of the motor C, as the case may be, but further prepares a circuit which becomes operative when the other of said primary valves is opened to continue the acceleration or retardation until the second-opened valve has been closed.

Having now described the invention what I believe to be new and desire to secure by letters patent, and what I, therefore, claim 1. Mechanism for synchronizing the operations 0t moving parts,compr1s1ng, in combination, a motor for driving one of the means comprising connections between said parts and the motor, including a plurality of valves and operating means therefor, the valve-operating means having openers for the valves and devices for rendering either opener inoperative with respect to its valve according to which part is traveling in ad vance of the other and for rendering both inoperative with respect to the valves when the parts are traveling in synchronism.

3. Mechanism for synchronizing the operations of moving arts, comprising, in combination, a pneumatic'motor for driving one of the parts and means for governing the operations of the motor,'s'aid -means comprising connections between the said parts and the motor, including an air conduit, a plurality of valves, connections between the valves and the conduit to vary the force ofthe air in the latter to accelerate or retard the speed of the motor according to which valve is opened first, openers for the valves, devices for rendering either opener inoperative with respect to its'valve, and elements by whichjsaid openers and devices are operated in"ac cord with the movement of the parts tobe synchronized, respectively.

4. Mechanlsm for synchronizing the op erations of moving parts, comprising, in combination, a motor for driving one of the parts and means for governing the operations of the motor, said means com rising connections between said parts and t e motor, including atmospheric ducts, valves for controlling said ducts, openers for said valves, devices for rendering either opener inoperative with relation to its valve, and elements by which said openers and devices are operated selectively in accord with the movements of the parts to be synchronized.

5. Mechanism for synchronizing the operations of moving parts, comprising, in combination, a motor for driving one of the parts and means for governing the operations of the motor, including a plurality of valves, openers for the valves, devices for rendering either opener inoperative with relation to its valve, means for operating said openers and devices in accord with the move ments of the parts to be synchronized and connections between said valves and the motor, said connections including valves respectively controlled by the first-mentioned I the primaryl valves and serving to cause the speed of the motor to be accelerated or retarded according to which of them is operated first.

6. Mechanism for synchronizing the-operations of moving parts, comprising, 111

combination, a pneumatic motor for driving and valved connections between said ducts and the conduit for varying the force of the air in the latter to increase or reduce the speed of the motor, respectively.

7. Mechanism for synchronizing the operations of moving parts, comprising, in

combination, a motor for driving one of the parts, primary valves, means for operating valves in accord with the movements of e parts to be synchronized, respectively, secondary valves, connections between the secondary valves and the amotor for accelerating or retardin tne speed of the motor accordin to which valve is opened, and connections between the primary valves and the secondary valves, the latter connections including valves and operating means therefor having elements for opening the valves and devices for rendermg either of said elements inoperative with relation to its valve. said elements'and devices (being controlled by the primary valves and selectivel controlling the operations of the secon ary valves.

8. Mechanism for synchronizing the operations of moving parts, comprising, 1n combinat on, a motor for driving one of the parts, primary 'valves, means for operating said valves in accord with the movements of the parts to be synchronized respectively, secondary valves, and connections between the primary valves and secondary valves, including intermediate valves, elements for openmg the intermediate valves and devices for adjusting either of said elements out of operative relation with its valve when the other element is moved to open its valve.

9. Mechanism for synchronizing the operations of moving parts, comprising, in comb1nation, a motor for driving one of the parts, prlmary valves, means for operatmg the prlmar valves in accord with the movements of t e'parts to be synchronized, respectively, secondary valves, connections between the secondary valves and the motor for increasing or decreasing the speed of the motor according to which valve is operated, and connections between the priselectively in accord with the' mary and secondary valves, the latter connections being controlled by the primary ,valves and in turn controlling the secondar valves, and including atmospheric ducts, va ves for controlling said ducts, respectively, openers for said valves, devices for rendering either opener inoperative with relation to its valve and means for operating said openers and devices from the primary valves.

10. Mechanism for synchronizing the operations of moving parts, comprising, in combination, a motor for driving one of said parts, primary controllers operating in accord with said parts respectively, and con- -nections between the primary controllers and the motor, including valves, valve operating elements periodically actuated under control of the primary controllers and devices under control of the controllers for rendering one or the other of the valve operating elements inoperative with relation to its valve.

11. Mechanism for synchronizing the operations of moving parts, comprising, in combination, a motor for driving one of said parts, primary controllers operable in accord with said parts, respectively, a plurality of valves, an actuating element for each of said valves, devices for rendering the actuating elements operative or inoperative with relation to the respective valves, connections between one primary controller and one of the actuating elements and between said primary controller and the device which renders the other actuating element inoperative with relation to its valve, connections between the other primary controller and the remaining actuating element and device, and connections between the valves and the motor, whereby thespeed of the motor is accelerated or retarded according to which of the valves is actuated.

12. Mechanism for synchronizing the operations of moving parts, comprising, in combination, a motor for driving one of said parts, primary controllers operable in accord with said parts respectively, and connections between the primary controllers and the motor, including valves, valve operating elements periodically actuated under control of the primary controllers, and devices under control of the primary controllers for rendering one or the other of said operating elements inoperative with respect to the corresponding valve according to which primary controller first becomes active, the connections further including valves which are respectively controlled by the first mentioned' valves, and in turn control the forces to, the inotor to accelerate or retard the speed of the latter, res ectively.

l3. Mec I anism for synchronizing the op erations of moving parts, compris1ng, in combination, a pneumatic motor for driving one of said parts, a pair of pneumatically operable valves, elements between the same and the motor through which thespeed of "the motor is accelerated or retarded accordate the first mentioned valves, respectively,-

pneumatically operated elements for openmg the second named valves respectively,

. pneumatically operated devices connected to the valve-opening elements for moving the latter severally into inoperative relation with the respective valves, primary controllers operable iniaccord with the parts to be synchronized, respectively, and means connecting one primary controller with the element for opening one of the second named valves and the device for moving the opener of the other of said valves out of operative relation with its valves, and for connecting the other primary controller with the remaining opening element and device.

14. Mechanism for synchronizing the operations of moving parts comprising, in combination, a motor for driving one of the parts to be synchronized, an air conduit connected to the motor, and means for varying the force of the'air in said conduit, including pressure operable valves, air connections between the valves and the conduit, said connections being controlled by the valves; primary controllers operable in accord with the movements of the parts to be synchronized, and means intermediate the primary controllers and said valves including movable elements selectively operated under control of the primary controllers and in turn controlling the pressuresto'which said valves are subjected, respectively.

15, In a mechanism for synchronizing the operations of moving parts, the combination with a pneumatic motor for driving one of the parts and an air conduit having communication with the motor and provided with means by which the. force of the air therein may be varied to increase the speed of" the motor when it is traveling too slow and decrease the speed of the motor when it is traveling too fast, of valves for controllin said means to increase or decrease the spec of the motor, respectively, and means for controlling said valves, the latter means including valves and elements for o suing the latter valves selectively. in accor with the operations of the parts to be synchronized.

16., In a mechanism for synchronizing the operations of moving parts, the combination with a pneumatic motor for driving one of the parts, of means for subjecting the motor to suctional forces of varying intensities, comprising a conduit having communication with said motor and provided with means through which the air therein is further attenuated and means through which the attenuation when the motor is traveling too slow of the air is reduced when the motor is travelin too fast, said means having controlling valves and'mechanism for selectively operating the latter valves in accord with the movements of the parts to be synchronized.

17 In a mechanism for synchronizing the operations of moving parts, the combination with a pneumatic motor for driving one of the parts, of means for subjecting the motor to sectional forces oi varying intensities comprising a conduit having communication with said motor and provided with means through which the air therein is further attenuated, and means through which the attenuation of the air is reduced, said means having pneumatically operable valves, air connections'to said valves, valves for controlling said connections, and elements controlled by the parts to be synchronized for selectively operating the latter valves to operate the first mentioned valves in accord 'with the movements of the parts to be synchronized,

18. Mechanism for-synchronizing the operations of moving parts, comprising, in combination, a motor for driving one of the parts, and means for governing the operations of the motor, including valves, connections to the motor controlled by the valves, a pair of pneumatics -for each valve, a valve-opener connected to one pneumatic of each pair, connections between the other pneumatics and, the openers, and means for operating the pneumatics to move either opener to open its valve and the other opener out of operative relation with its valve in accord with." the movements of the parts to be synchronized,

l9. ll lechanism for synchronizing the operations of moving parts, comprising, in combination, a for driving one of the parts, and means for governing the operations or the motona pair of valves, connections to the motor controlled by the valves, an operating pneumatic for each valve, pivoted. valve-opener connected to each operating pneumatic, additional pneumatics, de vices connected to the latter pneumatics and slidably engaged with-l the openers to move the latter into inoperative relation with the valves, means respectively controlled by the movements of the parts to be synchronized for controlling said pneumatics to open the valves in accord with the movements of said parts, one of said means being connected to the operating pneumatic of one valve and the additional pneumatic for he other valve and the other of said means h ing connected to the other operating pneumatic and additional pneumatic 20. Mechanism for synchronizing the on erations of moving parts, comprisinc combination, a motor for driving one or the parts and means governing the operaaccord with the movements of the, parts to tions of the motor control said ducts in accord with the m1 tions of the motor, including a conduit having connection with the motor, valves, valved connections controlled b first mentioned valves for varying the "force of the air in the conduit to accelerate or retard the speed of the motor according to which of the first mentioned valves is operated, a pair of pneumatics for each of the first-mentioned valves, a valve-opener connected to one pneumatic of each pair, connections between the other pneumatics and the openers, and means for operating the pneumatics to move either opener to open. its valve and the other opener out of operative relation with its valve in be synchronized.

21. Mechanism for synchronizin the operation of moving parts, com risin in combination, a motor for driving one or the parts and means for governing the operaincluding a conduit havmg connection wi r. a source of regulated suction and the motor, said conduit also havinc; an atmospheric port and valve for controlling said port, ducts having communication with a source oi? unr gulate 511C 'tion, valves for controlli. .d ducts, respectively, one of said ducts also, having communication. with the conduit, means con-- trolled by the other 1 t for operating the valve the atmos' neric port, and means for selectively opera i the valves wh ch ments of the parts to be synchronized. thereby incr ass or reduce the decree of v tenuation oi the air in the conduit accoI. 2.-- ing to which valve is ope Mechanism erations or" "noving combination r valve of the atmospheric pt a p n. valves, atmospheric ducts control ed lav the latter alves, means for opening the v :1 elves of one first mentioneo ducts e atmospheric ducts are op :d, resuscl and r opening re valves oil ts ctively in accord its or the parts to he synchro;

F23, l/Eechanism f r the op" synchronizing erat'i'ons of moving sing in comb nation, a motr "n one f parts and means ng the oneratlons the motor including a conduit 1 having connection with a source of regulated suction and the ,motor, said condult also having an atmospheric port and. a

valve for controlling said port, ducts having communication with a source of unregulated suction, valves for controlling said ducts, respectively, one of said ducts also having communication with the conduit, means controlled by the other duct for operating the valve of the atmospheric port, a pair of valves, atmospheric-ducts controlled by the latter valves, means foropening the valves of the first mentioned ducts when the atmospheric ducts are opened, respectively, a pair of pneumatics for each of the valves of the atmospheric ducts, a valve-opener connected to one pneumatic of each pair, connections between the other pneumatics and the openers, and means for operating the pneumatics to move either opener to open its valve and the other opener out of opera.-

' tive relation with its valve in accord. with the openers, respectively, connections be tween the other pneumatics and the openers, by which the openers are moved into inoperative relation with the respective valves, an air connection with the operating pneumatic of one opener and with the other pneumatic of the other opener, a second air connection with the other pneumatics, valves for controlling saidair connection, respectively, and means whereby the last mentioned valves are operated in accord with the movements of the parts to be synchronized, respectively.

25. Mechanism for synchronizing the operations of moving parts, comprising, in

combination, a motor for driving one of the parts and means for governing the opera tions of the motor, including valves, atmospheric ducts controlled thereby, valved con nections between the atmospheric ducts and the motor for accelerating the speed of the motor when one of the first mentioned valves is opened and retarding it when the other is opened, a pair of pneumatics for each first mentioned valve, a valve opener connected to one pneumatic of each pair, the latter pneumatics constituting operating pneumatics for the openers, respectively, connections be tween the other pneumatics and the opera 'ers by which the openers are moved into inoperative relation with the respective valves, an air connection with the operating pneumatic of one opener and with the other pneumatic of the other opener, a second air connection with the other pneumatics, valves for controlling said ,air connections, and means whereby the last mentioned valves are operated in accord with the movements of the parts to be synchronized, respectively.

26. Mechanism for synchronizing the operations of moving parts, comprising, in combination, a motor for driving one of said parts, primary controllers movable in accord with said parts respectively, and connections between the primary controllers and the motor,including a pair of pneumatically operable valves, the movement of one of which eiiects an increase of the speed of the motor and the movement of the other or" which eifects a decrease of the speed of the motor, a second pair of valves for controlling the pneumatic forces upon the firstnamed valves, pneumatically operable actuating means for the respectve last named valves, comprising valve-opening elements adapted to engage the valves or'to be moved to inoperative position with respect to said valves, and means between the primary con-' trollers and the actuating-means whereby each primary controller controls the actuating means of one to move one element to open said second pair of valves and to move the other element out of operative relation with the other of said valves. 2'2. In a synchronizingmechanism, a pair of valved members, a pneumatic for each of said members, valve openers moved by the pneumatics respectively, and a pneumatically operated device for rendering'each opener inoperative with respect to its valve.

28. In a synchronizing mechanism, the combination with a pair of valved members, a pneumatically operable means mounted upon. each of the members and serving to actuatethe valve thereof, and selectively operated devices for making said means inoperative with relation to their valves, re-. spectively.

29. Mechanism for synchronizing the operations of moving parts, comprising in combination, a motor for driving one of the parts, and means for governing the opera tion or the motor in accord with the movements of the parts including primary controllers for the moving parts, respectively, valves, valve openers, a pair of pneumatics connected to each opener, one pneumatic of each. pair serving to operate the opener to open its valve and the other pneumatic of each pair serving to adjust the opener out of op erative relation with its'valve, means for simultaneously controlling the forces eflec tive upon the operating pneumatic of one pair adjusting pneumatic of the other pair to operate one opener to open its valve and to adjust the other opener out of operative relation with its valve under control of the primary controller of the moving part which is in advance oi the other, and means for rendering ineffective upon the opener which has been moved to open its valve, the tendency of the ad usting pneumatic connected to said opener to disengage the latter from its valve when the primary controller of the other moving part comes into action.

30, Mechanism for synchronizing the operations of moving parts, comprising coin.

the valves, respectively, pneumatics for mov-- ing the openers into inoperative relation with their respective valves, and stops operatively" related to the valves to engage the openers,

31; Mechanism for synchronizing'the operations or" moving parts, comprising in c0mhinati'on, a motor for driving one of the parts and means for governing the operation of the motor in accord with the movements of the parts to be synchronized, including a pair of primary valves, a second pair of valves, openers for the latter valves, pneumatics connected to the openers for moving the same to open. the valves, respectively, pneumatics connected to the openers for adjusting the same out of operative relation with their respective valves, connections through which the pneumatics are controlled by the primary valves to open one or the other second valve according to which moving part is in advance of the other, and stops operatively related to said second valves to engage the openers.

32. Mechanism. for synchronizing the operations of moving parts, comprising in combination, a motor for driving one of the parts, a pair of primary controllers operable inaccord With the movements of said parts, respectively, and connections hetvveen the primary controllers and the motor, ncluding a pair of valves respectively operative to re ard or accelerate the speed. of the motor, openers for said valves respectively, pneuniatics connected to the openers for moving the same to openthe valves, respectively, nneumatics connected to the openers for lusting the same out of operative relation "with respective valves, means under control the primary controllers for con trolling tie forces effective upon the pneu- 1 ratios open one or the other of the valves accordinr" to which. moving part is in advance of c other, and stops operatively related to said valves to engage r lechanisin :t'or synchronising mama:

erations of moving parts, comprising in combination, a motor for driving one of the parts, an air conduit connected to the motor, and means for varying the force of the air in the conduitto accelerate or retard the speed. of the motor, including air connections to the conduit, pneumatically operable valves for controlling the connections, valves for controlling the pneumatic forces to the valves of said connections, openers for the second mentioned valves, pneumatics connected to the openers for moving the same to open said second mentioned valves, pneumatics connected to the openers for adjustthe same'out of operative relation With their valves, means operable in accord with the movements of the parts to be synchronised for. controlling the forces effective upon the pneumatics to open one or the other of the second mentioned valves according to which moving part is in advance of the other, and stops operatively related to said second mentioned valves to engage the openers.

34a Mechanism for synchronizing the operations of moving parts, comprising in combination, a'motor for driving one of the parts, and means for governing the operation of the motor in accord with the movements of the parts to be synchronized, including a pair of primary valves operable in accord With said moving parts respectively, a pair of secondary valves, and connections between the primary valves and the secondary valves for operating the secondary valves from the primary valves, respectively, said connections including additional valves for controlling the secondary valves, respectively, openers for the additional. valves, pneumatics connected to the openers for moving the same to open their valves, respectively, pneumatics connected to the openers for adjusting the same out of operative relation with their respective valves, means under control of the primary valves for con trolling the forces effective upon the pneuinatics to open one or the other of the additional valves according to which moving part is in advance of the other, and stops operatively related to saidadditional valves to engage the openers.

ddldcchanism for synchronizing the operation of moving parts comprising in combination a motor for one of said parts and means for eliecting an increase or decrease in the speed of the motor comprising a plurality of valves, means for actuating the valves under control of the moving parts respectively, devices under control of the moving parts for determining which of the valves is to be operated according to which. moving part is in advance of the other, and means for continuing the actuation va"ve throughout the corresponding cycle the other moving flitl't.

erations of moving parts, comprising, Y

36. Mechanism for synchronizing the operation of moving parts comprising in combination a motor for one of said parts and means for effecting an increase or decrease in the speed of the motor comprising a plurality of valves, motors for actuating the valves under control of the moving parts respectively, openers moved by the motors for engaging the valves to move the same, devices under control of the moving parts for moving the openers out of operative position with respect to the corresponding valves, one of the moving parts controlling the motor of one of the valves and the opener oi the other of said valves, and means for preventing the selecting mechanism from moving the openers to inoperative position between the time of action of a motor upon its valve and the cessation of the action of said motor thereon.

37. Mechanism for synchronizing the op eration'of moving parts comprising in combination a motor for one of said parts and means for effecting an increase or decrease in the speed of the motor comprising a plurality of valves, motors for actuating the valves under control of the moving parts respectively, openersmoved by the motors for engaging the valves to move the same, pneumatic devices under control of the moving parts for moving the openers out of valve operating position, one of the moving parts controlling the motor of one or" the valves and the opener of the other of the valves, and stops for preventing said pneumatic devices from moving the openers out of valve engaging position between the time of action of a motor upon its corresponding valve and the cessation of the action of said motor thereon.

38, Mechanism for synchronizing the on combination, a motor for driving one of said parts, a pair of valves, means for operating said valves in accord with the movements of the parts to be synchronized, including an operating element for each of the valves, means for rendering the operating element second actuated inoperative with respect to its valve, means for preventing the first actuated operating element from ceasing to exert its efiect upon its valve throughout the cycle of operation of the moving part that travels behind the other moving part, and connections between the valves and the motor for accelerating the speed of the motor when one valve is operated and retarding it when the other valve is operated.

39. Mechanism for synchronizing the operations or moving parts, comprising, in combination, a motor for driving one of said parts, primar controlling elements movable in accord wit the parts to be synchronised, respectively, a pair of valves, connections between the valves and the motor "for as celerating the speed of the motor when one valve is operated and retarding it when the othervalve is operated, operating elements for said valves, connections for controlling said operating elements from the rimary controlling elements, devices likewise connected with the primary controlling elements for adjusting either operating element out of operative relation with its valve when the other operating element is moved to actuate its valve, and stops for preventing disengagement of the engaged valve and its operating element from each other until the cycle of operation or" both controlling elements is completed.

40. Mechanism for synchronizing the opperations of moving parts, comprising, in combination, a motor for driving one'of said parts, primary controlling elements movable in accord with the parts to be synchronized, respectively, a pair of valves, connections between the valves and the motor for accelerating the speed of the motor when one valve is operated, and retarding it when the other valve is operated, operating elements for said valves, pneumatics with which'the operating elements have pivotal connection and which move the same bodily, other pneumatics having devices connected, to the valve operating elements to move the latter pivotally into inoperative relation with the valves, respectively, connections between the pneumatics which move one operating element bodily and the other pivotally and one primary controlling element, connections between the other pneumatics and the other primary controlling element, and stops to prevent disengagement of the engaged valve and its operating element from each other until the cycle of operation of both primary controlling elements has been completed.

41. Mechanism for synchronizing the op erations of moving parts, comprising, in combination, a motor for driving one oi said parts, and connections periodically operative in accord with the moving parts respectively and respectively effecting an increase and decrease of the speed of the motor, said connections including valves, operating elements for the valves, electric motors, elements for operating the valve-operating elements under control of the motors respectively, devices for rendering either valve-operating element inoperative with respect to its valve according to which moving a part is in advance oi the other, electric cirtraits in which the motors are included, and circuit breaking means therein, one of which is closed when the first-operated valve is moved, to partially complete the circuit, and the other of which is closed to complete the circuit upon movement of the operating element of the other of said valves.

into and out of operative relation with the valves, respectively, electric motors, means under control of said motors whereby when eitheri of the motors is energized, the corresponding valve is operated and the operating element for the other valve is moved out of operative relation with the latter, a main circuit in which the energized motor is included, said main circuit being controlled by one of the parts to be synchronized, and a shunt circuit in which said motor is included, having circuit closers therein, one of which is closed when one of the valves is moved and the other of which is closed under the influence of the valve operating element of the other valve.

43. Mechanism for synchronizing the operations of moving parts, comprising, in combination, a motor for driving one of said parts, and connections periodically operative in accord with the moving parts respectively and respectively effecting an increase and decrease of the speed of the motor, said connections including a pair of valves, an actuating means for each of said valves, each actuating means comprising an element capable of being moved to inoperative pos1- tion with respect to its valve, electric motors controlling the actuating means respectively, main circuits for the motors controlled from the moving parts, respectively, and a shunt circuit for each of said motors, each of said shunt circuits being under control of one valve and the inoperative element of the other valve.

44. Mechanism for synchronizing the operations of moving parts, comprising, in combination, a motor for driving one of the parts, a pair of valves, connections between said valves and the motor, including valves, elements to engage the latter valves and open the same, and devices to selectively move said elements into inoperative relation with their valves, said elements and devices. being controlled by the first-mentioned valves, and means for operating the first-mentioned valves in accord with the movements of the parts to be synchronized, including electric motors therefor, respectively, a source of electrical potential and main and shunt circuits in which the motors are included, the

shunt circuits including contactors to be engaged with each other when the secondmentioned valves are opened respectively, and other contactors to be engaged with each other by movement of the valve-operating elements which have been adjusted into intive in accord with the moving parts respectively and respectively eitecting an increase and decrease of the speed of the motor, said connections including a pair of valves, means controlled by said valves respectively for varying the effective strength of the forces exacted upon the motor, an operating element for each of the valves, actuating means for the operating elements, devices for moving the operatingelements to such position as to render them inoperative with respect to their corresponding valves, electric motors controlling the actuating means of the operating elements and the devices aforesaid, means for energizing the electric motors under control of the moving parts respectively, and means for continuing the energizing of the motors after the effect of the moving part which initially energized them,

ceases.

46. Mechanism for synchronizing the operations of moving parts, comprising, in combination, a motor for driving one of said parts, and connections periodically operative in accord with the moving parts respectively and respectively eflecting an increase and decrease of the speed of the motor, said connections including a pair of valves, means controlled by said valves respectively for varyin the effective strength of the forces exacted upon the motor, an operating element for each of the valves, actuating means for the operating elements, devices for moving the operating elements to such position as to render them inoperative with respect to their corresponding valves, electric motors controlling the actuating means of the operating elements and the devices aforesaid, means for energizing the electric motors under control of the moving parts respectively, and means for continuing the energizing of the motors after the effect of the moving part which initially energized them, ceases, and throughout the effective cycle of the operation of the moving part which is travelin behind the other.

47. echanism for synchronizing the operations of moving parts comprising, in combination, a motor for driving one of said parts, a pair of valves, connections between the valves and the motor, through which an increase or decrease in the speed of the motor is effected according to which of said valves is operated, pneumatic motors, elements moved by said pneumatic motors to actuate said valves, devices engaged with said elements to move one or the other to inoperative position with respect to the corresponding valve, a pair of electric motors, maincircuits in which said electric motors are included, said circuits being under control of the moving parts respectively, shunt circuits in which said electric motors are included, each shunt circuit being under the joint control of the pneumatic motor of one valve and the device which renders the element of the other valve inoperative, and means controlled b the electric motors respectively, for causmg the energizing of one of the electric motors to actuate the pneumatic motor of one of the valves and the device which renders the. operating element of the other valve inoperative.

48. Mechanism for synchronizing the operations of moving parts comprising, in combination, a motor for driving one of said parts, a pair of valves, connections between the valves and the motor through which an increase or decrease in the speed of the motor is efiected according to which of said valves is operated first, operating means for said valves respectively, comprising movable elements capable of being shifted out of operative relation with respect to the corresponding valves, devices for so shifting saidelements, electric motors, under control of the moving parts respectively, and a circuit for each of said motors including two circuit closing elements one of which is closed when one of the elements is moved to actuate its valve and the other of which is closed when the other element is moved to inoperative position, and stops for preventing the devices from moving the elements to inoperative position with respect to said valves throughout the effective cycle of movement of the moving part that travels behind the other. I

49. Mechanism for synchronizing the operations of moving arts comprising, in combination, a motor or driving one or said parts, a pair of valves, connections between the valves and the motor through which an increase or decrease in the speed of the motor is effected according to which of said valves is operated first, operating means for said valves respectively, comprising pneumatics, elements moved by said pneumatics for engaging the valves to actuate the latter, pneumatic devices for shifting said elements to positions in which they are inoperative with respect to the corresponding valves, electric motors, energized under control of the moving parts respectively, each of said electric motors controlling the operating means of one valve, and the pneumatic device of the other of said valves, and stops for preventing the pneumatic device last operated from moving the corresponding element out of valve engaging position.

In testimony whereof I affix m signature.

HEINRICH BO KI'SCH. 

